Manpage of FPURGE
FPURGESection: Linux Programmer's Manual (3)
NAMEfpurge, __fpurge - purge a stream
/* unsupported */ #include <stdio.h>int fpurge(FILE *stream);/* supported */ #include <stdio.h>
#include <stdio_ext.h>void __fpurge(FILE *stream);
DESCRIPTIONThe function fpurge() clears the buffers of the given stream. For output streams this discards any unwritten output. For input streams this discards any input read from the underlying object but not yet obtained via getc(3); this includes any text pushed back via ungetc(3). See also fflush(3).
RETURN VALUEUpon successful completion fpurge() returns 0. On error, it returns -1 and sets errnoappropriately.
- streamis not an open stream.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|__fpurge()||Thread safety||MT-Safe race:stream|
CONFORMING TOThese functions are nonstandard and not portable. The function fpurge() was introduced in 4.4BSD and is not available under Linux. The function __fpurge() was introduced in Solaris, and is present in glibc 2.1.95 and later.
NOTESUsually it is a mistake to want to discard input buffers.
SEE ALSOfflush(3), setbuf(3), stdio_ext(3)
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